I have been trying to use the pop-up feature in Canvas and i used the HTML that has been posted in several community posts.  It used to work just fine with one pop-up and then you could click the "X" and it would disappear.  Well, now when I click the "X" there is another pop-up that I have to close as well.  I cannot figure out the HTML to fix this.

Here is what I use:

<div id="dialog_for_link1" class="enhanceable_content dialog">here is the text for the pop up</div>

<p><a id="link1" href="#dialog_for_link1">This is the text for the button</a></p>